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NSR database version of May 24, 2024.

Search: Author = M.Vermeulen

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2023HE06      Phys.Lett. B 841, 137933 (2023)

S.Hellgartner, D.Mucher, K.Wimmer, V.Bildstein, J.L.Egido, R.Gernhauser, R.Krucken, A.K.Nowak, M.Zielinska, C.Bauer, M.L.L.Benito, S.Bottoni, H.DeWitte, J.Elseviers, D.Fedorov, F.Flavigny, A.Illana, M.Klintefjord, T.Kroll, R.Lutter, B.Marsh, R.Orlandi, J.Pakarinen, R.Raabe, E.Rapisarda, S.Reichert, P.Reiter, M.Scheck, M.Seidlitz, B.Siebeck, E.Siesling, T.Steinbach, T.Stora, M.Vermeulen, D.Voulot, N.Warr, F.J.C.Wenander

Axial and triaxial degrees of freedom in 72Zn

NUCLEAR REACTIONS 109Ag(72Zn, 72Zn'), E=2.85 MeV/nucleon, [secondary 72Zn beam from U(p, F), E=1.4 GeV primary beam using UCx target, resonant ionization laser ion Source, and High Resolution mass Separator at the REX-ISOLDE-CERN facility]; measured particle spectra using C-REX array of two annular double-sided silicon strip detectors (DSSSD), Doppler-corrected Eγ, Iγ, (particle)γ-coin, σ(θ, E(level)) using Miniball array of eight six-fold segmented HPGe triple cluster detectors for γ radiation. 72Zn; deduced levels, Jπ, E2 matrix elements, B(E2), spectroscopic quadrupole moments for the first two 2+ states, first excited 0+ and first 4+ states using GOSIA-GOSIA2 analysis in multiple safe Coulomb excitation; calculated potential energy surface (PES) in (β, γ) planes for the g.s., first excited 0+ and 2+ states, and the 2+ state of the γ band in the PNAMP approach. Comparison to shell-model calculations using jj44c and JUN45 effective interactions, and to mean-field generator coordinate method (GCM) calculations. Systematics and theoretical predictions of B(E2) values for 62,64,66,68,70,72,74,76,78,80Zn for the first 2+ and 4+ states.

doi: 10.1016/j.physletb.2023.137933
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2020VE07      Phys.Rev. C 102, 054610 (2020)

M.J.Vermeulen, K.Nishio, K.Hirose, K.R.Kean, H.Makii, R.Orlandi, K.Tsukada, I.Tsekhanovich, A.N.Andreyev, S.Ishizaki, M.Okubayashi, S.Tanaka, Y.Aritomo

Measurement of fission-fragment mass distributions in the multinucleon transfer channels of the 18O + 237Np reaction

NUCLEAR REACTIONS 237Np(18O, X)234U*/235U*/236U*/237U*/236Np*/237Np*/238Np*/239Np*/238Pu*/239Pu*/240Pu*/241Pu*/240Am*/241Am*/242Am*/243Am*/242Cm*/243Cm*/244Cm*/245Cm*/244Bk*/245Bk*/246Bk*, E=162.0 MeV from tandem accelerator facility of Japan Atomic Energy Agency (JAEA); measured fission fragments from the fission of reaction products U(A=234-237), Np(A=236-239), Pu(A=238-241), Am(A=240-243), Cm(A=242-244) and Bk(A=244-246) using ΔE-E silicon telescope to detect ejectiles, and four multiwire proportional counters, to detect fission fragments (FFs); deduced yields of fission fragments as a function of their mass and total excitation energy for each multi-nucleon transfer (MNT) channel, fission-fragment mass distributions as function of excitation energy of 7-70 MeV, most probable total excitation energy for each channel, light-fragment and heavy-fragment mass distributions. Comparison with Langevin theoretical calculations including the multichance fission (MCF) process of fission after neutron evaporation.

doi: 10.1103/PhysRevC.102.054610
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2019FL06      Phys.Rev. C 99, 054332 (2019)

F.Flavigny, J.Elseviers, A.N.Andreyev, C.Bauer, V.Bildstein, A.Blazhev, B.A.Brown, H.De Witte, J.Diriken, V.N.Fedosseev, S.Franchoo, R.Gernhauser, M.Huyse, S.Ilieva, S.Klupp, Th.Kroll, R.Lutter, B.A.Marsh, D.Mucher, K.Nowak, T.Otsuka, J.Pakarinen, N.Patronis, R.Raabe, F.Recchia, P.Reiter, T.Roger, S.Sambi, M.Seidlitz, M.D.Seliverstov, B.Siebeck, Y.Tsunoda, P.Van Duppen, M.Vermeulen, M.Von Schmid, D.Voulot, N.Warr, F.Wenander, K.Wimmer

Microscopic structure of coexisting 0+ states in 68Ni probed via two-neutron transfer

NUCLEAR REACTIONS 3H(66Ni, p)68Ni, E=2.6 MeV/nucleon; measured Ep, Ip, Eγ, Iγ, pγ-coin, differential σ(θ) distributions of transfer to ground state, first excited 0+ and first 2+ states in 68Ni using the T-REX silicon particle detector array for light charged recoil detection and the Miniball detector array for γ detection at ISOLDE-CERN. 68Ni; deduced levels, L-transfer, neutron and proton average orbital occupancies of ground state, excited 0+ state, and the first 2+ state. DWBA analysis of angular distributions using the FRESCO code. Comparison with shell model calculations with the A3DA-m and the JJ44pna interaction. Discussed feeding of the 0+ states by the transfer of neutrons mainly filling the N=40 subshell closure for the ground state.

doi: 10.1103/PhysRevC.99.054332
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2019KE06      Phys.Rev. C 100, 014611 (2019)

K.R.Kean, K.Nishio, K.Hirose, M.J.Vermeulen, H.Makii, R.Orlandi, K.Tsukada, A.N.Andreyev, I.Tsekhanovich, S.Chiba

Validation of the multinucleon transfer method for the determination of the fission barrier height

NUCLEAR REACTIONS 237Np, Ni(18O, 18O), (18O, 17O), (18O, 16O), (18O, 17N), (18O, 16N), (18O, 15N), (18O, 14N), (18O, 15C), (18O, 14C), (18O, 13C), (18O, 12C), (18O, 11C), (18O, 11B), (18O, 10B), (18O, 10Be), (18O, 9Be), (18O, 7Be), (18O, 7Li), (18O, 6Li), E=162 MeV; measured reaction products, particle identification plots, energy loss versus total energy, (charged particles)(fission fragment)-coin using four multiwire proportional counters for fission fragment detection and segmented silicon ΔE-E telescope for ejectile detection at the JAEA tandem accelerator facility; deduced fission probabilities and fission barrier heights for 239Np, 239Pu and 240Pu at E*=0-24 MeV using multinucleon transfer (MNT) method. Comparison with previous experimental values, and in RIPL3 database.

doi: 10.1103/PhysRevC.100.014611
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2019TS02      Phys.Lett. B 790, 583 (2019)

I.Tsekhanovich, A.N.Andreyev, K.Nishio, D.Denis-Petit, K.Hirose, H.Makii, Z.Matheson, K.Morimoto, K.Morita, W.Nazarewicz, R.Orlandi, J.Sadhukhan, T.Tanaka, M.Vermeulen, M.Warda

Observation of the competing fission modes in 178Pt

NUCLEAR REACTIONS 142Nd(36Ar, X)178Pt, E=155, 170, 180 MeV; measured reaction products; deduced fission fragment yields, first observation of a multimodal fission in the sub-lead region.

doi: 10.1016/j.physletb.2019.02.006
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2017HI03      Nucl.Instrum.Methods Phys.Res. A856, 133 (2017)

K.Hirose, K.Nishio, H.Makii, I.Nishinaka, S.Ota, T.Nagayama, N.Tamura, S.Goto, A.N.Andreyev, M.J.Vermeulen, S.Gillespie, C.Barton, A.Kimura, H.Harada, S.Meigo, S.Chiba, T.Ohtsuki

Simultaneous measurement of neutron-induced fission and capture cross sections for 241Am at neutron energies below fission threshold

NUCLEAR REACTIONS 241Am(n, F), (n, γ), E<20 eV; measured reaction products, En, In, Eγ, Iγ; deduced σ, resonances. Comparison with JENDL-4.0, JEFF evaluated nuclear data libraries.

doi: 10.1016/j.nima.2016.12.021
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2017HI10      Phys.Rev.Lett. 119, 222501 (2017)

K.Hirose, K.Nishio, S.Tanaka, R.Leguillon, H.Makii, I.Nishinaka, R.Orlandi, K.Tsukada, J.Smallcombe, M.J.Vermeulen, S.Chiba, Y.Aritomo, T.Ohtsuki, K.Nakano, S.Araki, Y.Watanabe, R.Tatsuzawa, N.Takaki, N.Tamura, S.Goto, I.Tsekhanovich, A.N.Andreyev

Role of Multichance Fission in the Description of Fission-Fragment Mass Distributions at High Energies

NUCLEAR REACTIONS 238U(18O, X)237U/238U/239U/240U/240Np/241Np/242Np/241Pu/242Pu/243Pu/244Pu, E=157.5 MeV; measured reaction products; deduced fragment yields.

doi: 10.1103/PhysRevLett.119.222501
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2017MA15      Phys.Lett. B 768, 1 (2017)

C.Massimi, S.Altstadt, J.Andrzejewski, L.Audouin, M.Barbagallo, V.Becares, F.Becvar, F.Belloni, E.Berthoumieux, J.Billowes, S.Bisterzo, D.Bosnar, M.Brugger, M.Calviani, F.Calvino, D.Cano-Ott, C.Carrapico, D.M.Castelluccio, F.Cerutti, E.Chiaveri, L.Cosentino, M.Chin, G.Clai, N.Colonna, G.Cortes, M.A.Cortes-Giraldo, S.Cristallo, M.Diakaki, C.Domingo-Pardo, I.Duran, R.Dressler, C.Eleftheriadis, A.Ferrari, P.Finocchiaro, K.Fraval, S.Ganesan, A.R.Garcia, G.Giubrone, I.F.Goncalves, E.Gonzalez-Romero, E.Griesmayer, C.Guerrero, F.Gunsing, A.Hernandez-Prieto, D.G.Jenkins, E.Jericha, Y.Kadi, F.Kappeler, D.Karadimos, N.Kivel, P.Koehler, M.Kokkoris, S.Kopecky, M.Krticka, J.Kroll, C.Lampoudis, C.Langer, E.Leal-Cidoncha, C.Lederer, H.Leeb, L.S.Leong, S.Lo Meo, R.Losito, A.Mallick, A.Manousos, J.Marganiec, T.Martinez, P.F.Mastinu, M.Mastromarco, E.Mendoza, A.Mengoni, P.M.Milazzo, F.Mingrone, M.Mirea, W.Mondelaers, A.Musumarra, C.Paradela, A.Pavlik, J.Perkowski, M.Pignatari, L.Piersanti, A.Plompen, J.Praena, J.M.Quesada, T.Rauscher, R.Reifarth, A.Riego, M.S.Robles, C.Rubbia, M.Sabate-Gilarte, R.Sarmento, A.Saxena, P.Schillebeeckx, S.Schmidt, D.Schumann, G.Tagliente, J.L.Tain, D.Tarrio, L.Tassan-Got, A.Tsinganis, S.Valenta, G.Vannini, I.Van Rijs, V.Variale, P.Vaz, A.Ventura, M.J.Vermeulen, V.Vlachoudis, R.Vlastou, A.Wallner, T.Ware, M.Weigand, C.Weiss, R.Wynants, T.Wright, P.Zugec

Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α, n)25Mg

NUCLEAR REACTIONS 25Mg(n, γ), (n, X), E<300 KeV; measured reaction products, En, In, Eγ, Iγ; deduced yields, σ, resonance parameters and corresponding excitation energies of the 26Mg compound nucleus, Maxwellian-averaged cross sections, reaction rates for inverse reactions. R-matrix analysis of the experimental data.

doi: 10.1016/j.physletb.2017.02.025
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23327. Data from this article have been entered in the XUNDL database. For more information, click here.


2017PA12      J.Phys.(London) G44, 064009 (2017)

J.Pakarinen, T.Grahn, L.P.Gaffney, A.Algora, C.Bauer, A.Blazhev, N.Bree, T.E.Cocolios, H.De Witte, J.Diriken, P.Fernier, K.Hadynska-Klek, A.Herzan, M.Huyse, J.Iwanicki, U.Jakobsson, D.Jenkins, N.Kesteloot, J.Konki, B.Lannoo, P.Papadakis, P.Peura, P.Rahkila, G.Rainovski, E.Rapisarda, P.Reiter, S.Sambi, M.Scheck, B.Seibeck, M.Seidlitz, T.Stora, P.Van Duppen, N.Warr, F.Wenander, M.J.Vermeulen, D.Voulot, K.Wrzosek-Lipska, M.Zielinska

Collectivity in 196, 198Pb isotopes probed in Coulomb-excitation experiments at REX-ISOLDE

NUCLEAR REACTIONS 112Cd(196Pb, 196Pb'), (198Pb, 198Pb'), E=2.82 MeV/nucleon; measured reaction products, Eγ, Iγ. 196,198Pb; deduced γ-ray energies, J, π, quadrupole moments, B(E2). GOSIA2 code simultaneous treatment both target and beam excitations, comparison with available data.

doi: 10.1088/1361-6471/aa6753
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2016CL01      Phys.Rev.Lett. 116, 022701 (2016)

E.Clement, M.Zielinska, A.Gorgen, W.Korten, S.Peru, J.Libert, H.Goutte, S.Hilaire, B.Bastin, C.Bauer, A.Blazhev, N.Bree, B.Bruyneel, P.A.Butler, J.Butterworth, P.Delahaye, A.Dijon, D.T.Doherty, A.Ekstrom, C.Fitzpatrick, C.Fransen, G.Georgiev, R.Gernhauser, H.Hess, J.Iwanicki, D.G.Jenkins, A.C.Larsen, J.Ljungvall, R.Lutter, P.Marley, K.Moschner, P.J.Napiorkowski, J.Pakarinen, A.Petts, P.Reiter, T.Renstrom, M.Seidlitz, B.Siebeck, S.Siem, C.Sotty, J.Srebrny, I.Stefanescu, G.M.Tveten, J.Van de Walle, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, A.Wiens, H.De Witte, K.Wrzosek-Lipska

Spectroscopic Quadrupole Moments in 96, 98Sr: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes at N=60

NUCLEAR REACTIONS 109Ag, 120Sn(96Sr, 96Sr'), E=275 MeV;60Ni, 208Pb(98Sr, 98Sr'), E=276 MeV; measured reaction products, Eγ, Iγ. 96,98Sr; deduced B(E2) and B(M1)values, spectroscopic quadrupole moments. Comparison with beyond-mean-field calculations using the Gogny D1S interaction, least squares fitting code GOSIA.

NUCLEAR STRUCTURE 96,98Sr; calculated B(E2) values with the Gogny D1S interaction in a five-dimensional collective Hamiltonian (5DCH) formalism.

doi: 10.1103/PhysRevLett.116.022701
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2016CL03      Phys.Rev. C 94, 054326 (2016)

E.Clement, M.Zielinska, S.Peru, H.Goutte, S.Hilaire, A.Gorgen, W.Korten, D.T.Doherty, B.Bastin, C.Bauer, A.Blazhev, N.Bree, B.Bruyneel, P.A.Butler, J.Butterworth, J.Cederkall, P.Delahaye, A.Dijon, A.Ekstrom, C.Fitzpatrick, C.Fransen, G.Georgiev, R.Gernhauser, H.Hess, J.Iwanicki, D.G.Jenkins, A.C.Larsen, J.Ljungvall, R.Lutter, P.Marley, K.Moschner, P.J.Napiorkowski, J.Pakarinen, A.Petts, P.Reiter, T.Renstrom, M.Seidlitz, B.Siebeck, S.Siem, C.Sotty, J.Srebrny, I.Stefanescu, G.M.Tveten, J.Van de Walle, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, A.Wiens, H.De Witte, K.Wrzosek-Lipska

Low-energy Coulomb excitation of 96, 98Sr beams

NUCLEAR REACTIONS 60Ni, 208Pb(98Sr, 98Sr'), E=276.3 MeV; 109Ag, 120Sn(96Sr, 96Sr'), E=275.5 MeV; measured Eγ, Iγ, scattered Sr ions and target recoils, (particle)γ-coin, γ(θ), differential Coulomb excitation cross sections using Miniball array for γ detection and Si strip detectors for ions at REX-ISOLDE-CERN facility. 96,98Sr; deduced levels, E2 and M1 matrix elements, B(E2) and level half-lives, quadrupole moments and deformation parameters, E0 monopole transition strengths using GOSIA2 analysis. Comparison with previous experimental data and five-dimensional collective Hamiltonian and Gogny D1S force, and using complex excited VAMPIR approach. Systematics of level energies, transitional and spectroscopic quadrupole moments in 94,96Kr, 96,98Sr, 98,100Zr, 100,102Mo. Systematics of energy and B(E2) for first 2+ state, and energies of second 0+ states in 90,92,94,96,98,100,102Sr. 60Ni, 208Pb(98Rb, 98Rb'), E=276 MeV; measured Eγ, Iγ, scattered Rb ions and target recoils, (particle)γ-coin, γ(θ), level half-lives by recoil-distance Doppler shift method. 98Rb; deduced levels.

doi: 10.1103/PhysRevC.94.054326
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2016GR17      Eur.Phys.J. A 52, 340 (2016)

T.Grahn, J.Pakarinen, L.Jokiniemi, M.Albers, K.Auranen, C.Bauer, C.Bernards, A.Blazhev, P.A.Butler, S.Bonig, A.Damyanova, T.De Coster, H.De Witte, J.Elseviers, L.P.Gaffney, M.Huyse, A.Herzan, U.Jakobsson, R.Julin, N.Kesteloot, J.Konki, Th.Kroll, L.Lewandowski, K.Moschner, P.Peura, M.Pfeiffer, D.Radeck, P.Rahkila, E.Rapisarda, P.Reiter, K.Reynders, M.Rudiger, M.-D.Salsac, S.Sambi, M.Scheck, M.Seidlitz, B.Siebeck, T.Steinbach, S.Stolze, J.Suhonen, P.Thoele, M.Thurauf, N.Warr, P.Van Duppen, M.Venhart, M.J.Vermeulen, V.Werner, M.Veselsky, A.Vogt, K.Wrzosek-Lipska, M.Zielinska

Collective 2+1 excitations in 206Po and 208, 210Rn

NUCLEAR REACTIONS 104Pd, 114Cd(206Po, x), E=2.85 MeV/nucleon;104Pd, 114Cd(208Rn, x), (210Rn, x), E=2.82 MeV/nucleon; measured Coulomb excitation Eγ, Iγ, γγ-coin using MINIBALL γ spectrometer, scattered projectiles and target recoils using annular double-sided Si strip detectors (CD), time difference between MINIBALL γ's and CD data; deduced γ ray energy spectra, diagonal vs transitional matrix element, B(E2); calculated B(E2) using QRPA.

doi: 10.1140/epja/i2016-16340-6
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2016KL05      Phys.Rev. C 93, 054303 (2016)

M.Klintefjord, K.Hadynska-Klek, A.Gorgen, C.Bauer, F.L.Bello Garrote, S.Bonig, B.Bounthong, A.Damyanova, J.-P.Delaroche, V.Fedosseev, D.A.Fink, F.Giacoppo, M.Girod, P.Hoff, N.Imai, W.Korten, A.-C.Larsen, J.Libert, R.Lutter, B.A.Marsh, P.L.Molkanov, H.Naidja, P.Napiorkowski, F.Nowacki, J.Pakarinen, E.Rapisarda, P.Reiter, T.Renstrom, S.Rothe, M.D.Seliverstov, B.Siebeck, S.Siem, J.Srebrny, T.Stora, P.Thole, T.G.Tornyi, G.M.Tveten, P.Van Duppen, M.J.Vermeulen, D.Voulot, N.Warr, F.Wenander, H.De Witte, M.Zielinska

Structure of low-lying states in 140Sm studied by Coulomb excitation

NUCLEAR REACTIONS 94Mo(140Sm, 140Sm'), (140Sm, 94Mo'), E=2.85 MeV/nucleon, [secondary 140Sm beam from Ta(p, X), E=1.4 GeV reaction at ISOLDE-CERN using RILIS, REXTRAP and EBIS]; measured scattered 140Sm and 94Mo particles, Eγ, Iγ, (particle)γ-coin, γ-yields using MINIBALL array for γ rays and DSSSD detectors for particle detection, γ spectra with laser on and off, γ-ray angular distributions. 140Sm; deduced E2 matrix elements, B(E2), spectroscopic quadrupole moment for the first two 2+ and the first 4+ states using coupled channel code GOSIA and normalized to γ-ray yield for first 2+ state in 94Mo target, and to known half-life for the first 2+ in 140Sm. Comparison with theoretical calculations using beyond-mean-field model with Gogny D1S interaction, shell model, interacting boson approximation (IBA), and E(5) symmetry. Calculated potential energy surface in (β, γ) plane for 140Sm. 95Mo; measured Iγ yield for 3/2+ to 5/2+ ground-state transition.

doi: 10.1103/PhysRevC.93.054303
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2015BO11      Phys.Rev. C 92, 024322 (2015)

S.Bottoni, S.Leoni, B.Fornal, R.Raabe, K.Rusek, G.Benzoni, A.Bracco, F.C.L.Crespi, A.I.Morales, P.Bednarczyk, N.Cieplicka-Orynczak, W.Krolas, A.Maj, B.Szpak, M.Callens, J.Bouma, J.Elseviers, H.De Witte, F.Flavigny, R.Orlandi, P.Reiter, M.Seidlitz, N.Warr, B.Siebeck, S.Hellgartner, D.Mucher, J.Pakarinen, M.Vermeulen, C.Bauer, G.Georgiev, R.V.F.Janssens, D.Balabanski, M.Sferrazza, M.Kowalska, E.Rapisarda, D.Voulot, M.Lozano Benito, F.Wenander

Cluster-transfer reactions with radioactive beams: A spectroscopic tool for neutron-rich nuclei

NUCLEAR REACTIONS 7Li(98Rb, xnα), (98Rb, xnt), E=279 MeV; measured Eγ, (7Li)γ-, αγ-, tγ-coin, differential σ(θ), absolute cross sections for triton and α transfers using MINIBALL Ge array and Si detector system T-REX at REX-ISOLDE-CERN facility. Cluster-transfer reactions. DWBA calculations using FRESCO code. 98Rb, 98,99Sr, 99,100Y, 100Zr; observed γ rays in particle-γ-coin spectra and γγ-coin spectra.

doi: 10.1103/PhysRevC.92.024322
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2276. Data from this article have been entered in the XUNDL database. For more information, click here.


2015KE06      Phys.Rev. C 92, 054301 (2015)

N.Kesteloot, B.Bastin, L.P.Gaffney, K.Wrzosek-Lipska, K.Auranen, C.Bauer, M.Bender, V.Bildstein, A.Blazhev, S.Bonig, N.Bree, E.Clement, T.E.Cocolios, A.Damyanova, I.Darby, H.De Witte, D.DiJulio, J.Diriken, C.Fransen, J.E.Garcia-Ramos, R.Gernhauser, T.Grahn, P.-H.Heenen, H.Hess, K.Heyde, M.Huyse, J.Iwanicki, U.Jakobsson, J.Konki, T.Kroll, B.Laurent, N.Lecesne, R.Lutter, J.Pakarinen, P.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, M.Scheck, M.Seidlitz, M.Sferrazza, B.Siebeck, M.Sjodin, H.Tornqvist, E.Traykov, J.Van De Walle, P.Van Duppen, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, K.Wimmer, M.Zielinska

Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes

NUCLEAR REACTIONS 104Pd(196Po, 196Po'), (200Po, 200Po'), (202Po, 202Po'), 94Mo(198Po, 198Po'), (202Po, 202Po'), E=2.85 MeV/nucleon, [secondary Po beams from U(p, X), E=1.4 GeV at REX-ISOLDE-CERN facility]; measured Eγ, Iγ, γγ-coin, (Po x ray)γ-coin, (scattered particle)γ-coin, (particle)γ(t), angular distribution of scattered particles, Coulomb excitation yields for excited states in beams and targets during laser-on and laser-off using double-sided silicon-strip detectors (DSSSDs) for particles and Miniball array for γ rays. 196,198,200,202Po; deduced levels, J, π, E2 matrix elements, B(E2), deformation parameters, transition quadrupole moments. 94Mo, 104Pd; deduced levels, Coulomb excitation yields. GOSIA analysis of Coulomb excitation yields. Comparison with predictions of beyond-mean-field (BMF) model, interacting boson model (IBM), general Bohr Hamiltonian (GBH) model, phenomenological two-level mixing model, and with previous measurement of mean-square charge radii.

doi: 10.1103/PhysRevC.92.054301
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2015KL01      Acta Phys.Pol. B46, 607 (2015)

M.Klintefjord, K.Hadynska-Klek, J.Samorajczyk, A.Gorgen, Ch.Droste, J.Srebrny, T.Abraham, C.Bauer, F.L.Bello Garrote, S.Bonig, A.Damyanova, F.Giacoppo, E.Grodner, P.Hoff, M.Kisielinski, M.Komorowska, W.Korten, M.Kowalczyk, J.Kownacki, A.C.Larsen, R.Lutter, T.Marchlewski, P.Napiorkowski, J.Pakarinen, E.Rapisarda, P.Reiter, T.Renstrom, B.Siebeck, S.Siem, A.Stolarz, R.Szenborn, P.Thole, T.Tornyi, A.Tucholski, G.M.Tveten, P.Van Duppen, M.J.Vermeulen, N.Warr, H.De Witte, M.Zielinska

Spectroscopy of Low-lying States in 140Sm

NUCLEAR REACTIONS 94Mo(140Sm, 140Sm'), E=2.85 MeV/nucleon; measured reaction products, Eγ, Iγ. 140Sm; deduced energy levels, J, π, angular correlation coefficients, B(E2). GOSIA analysis.

doi: 10.5506/APhysPolB.46.607
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2015SI01      Phys.Rev. C 91, 014311 (2015)

B.Siebeck, M.Seidlitz, A.Blazhev, P.Reiter, R.Altenkirch, C.Bauer, P.A.Butler, H.De Witte, J.Elseviers, L.P.Gaffney, H.Hess, M.Huyse, T.Kroll, R.Lutter, J.Pakarinen, N.Pietralla, F.Radeck, M.Scheck, D.Schneiders, C.Sotty, P.Van Duppen, M.Vermeulen, D.Voulot, N.Warr, F.Wenander

Testing refined shell-model interactions in the sd shell: Coulomb excitation of 26Na

NUCLEAR REACTIONS 104Pd(26Na, 26Na'), E=2.82 MeV/nucleon, [secondary 26Na beam from U(p, X), E=1 GeV primary reaction]; measured Eγ, Iγ, (scattered particle)γ-coin using REX-ISOLDE facility and MINIBALL array at CERN. Coulomb excitation. 26Na; deduced levels, J, π, B(E2), B(M1), configuration. 104Pd; B(E2) for first 2+ used for normalization of data for 26Na. Analysis by coupled channels Coulomb excitation code GOSIA2. Comparison with shell model calculations using USD, USDA and USDB interactions.

doi: 10.1103/PhysRevC.91.014311
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2015ST08      Phys.Rev. C 91, 054326 (2015)

R.Stegmann, C.Bauer, G.Rainovski, N.Pietralla, C.Stahl, S.Bonig, S.Ilieva, A.Blazhev, A.Damyanova, M.Danchev, K.Gladnishki, J.Jolie, R.Lutter, J.Pakarinen, D.Radeck, E.Rapisarda, P.Reiter, M.Scheck, B.Siebeck, T.Stora, P.Thole, T.Thomas, M.Thurauf, M.J.Vermeulen, D.Voulot, N.Warr, F.Wenander, V.Werner, H.De Witte

Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The B(E2; 2+1 → 0+1) value of 142Sm

NUCLEAR REACTIONS 48Ti, 94Mo(142Sm, 142Sm'), E=405 MeV, [secondary 142Sm beam from Ta(p, X), E=1.4 GeV from PS booster at CERN and using RILIS and GPS setup at ISOLDE-CERN]; measured Eγ, Iγ, (particle)γ-coin, γ-particle yields as function of angle using MINIBALL HPGe-detector array at REX-ISOLDE-CERN facility. Coulomb excitation technique. 142Sm; deduced matrix elements and B(E2) for the first 2+ state in 142Sm. Systematics of B(E2) values for first 2+ state in 130Sn, 132Te, 134Xe, 136Ba, 138Ce, 140Nd, 142Sm. Comparison with shell-model calculations.

RADIOACTIVITY 142Pm, 142,142mEu, 142Sm(EC), (β+); measured Iγ; deduced 142mEu/142Eu isomeric ratio, and M(142Eu)/M(142Sm).

doi: 10.1103/PhysRevC.91.054326
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2014IL02      Phys.Rev. C 89, 054316 (2014)

A.Illana, A.Jungclaus, R.Orlandi, A.Perea, C.Bauer, J.A.Briz, J.L.Egido, R.Gernhauser, J.Leske, D.Mucher, J.Pakarinen, N.Pietralla, M.Rajabali, T.R.Rodriguez, D.Seiler, C.Stahl, D.Voulot, F.Wenander, A.Blazhev, H.De Witte, P.Reiter, M.Seidlitz, B.Siebeck, M.J.Vermeulen, N.Warr

Low-velocity transient-field technique with radioactive ion beams: g factor of the first excited 2+ state in 72Zn

NUCLEAR MOMENTS 72Zn; measured Eγ, Iγ, (particle)γ-coin, γγ(θ, H), precession angles, g factor using the transient-field (TF) technique and MINIBALL cluster Ge detectors at REX-ISOLDE-CERN facility. 72Zn beam of 2.94 MeV/nucleon was obtained from bombardment of UCx target with 1.4-GeV protons using RILIS ion source, REXTRAP, and EBIS ion source. Comparison with shell-model and triaxial beyond-mean-field calculations, and with previous experimental results. Systematics of g factors of first 2+ states in even-even N=32-66 Zn, Ge, Se, Kr and Sr isotopes.

doi: 10.1103/PhysRevC.89.054316
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2013AL05      Nucl.Phys. A899, 1 (2013); Erratum Nucl.Phys. A947, 260 (2016)

M.Albers, K.Nomura, N.Warr, A.Blazhev, J.Jolie, D.Mucher, B.Bastin, C.Bauer, C.Bernards, L.Bettermann, V.Bildstein, J.Butterworth, M.Cappellazzo, J.Cederkall, D.Cline, I.Darby, S.Das Gupta, J.M.Daugas, T.Davinson, H.De Witte, J.Diriken, D.Filipescu, E.Fiori, C.Fransen, L.P.Gaffney, G.Georgiev, R.Gernhauser, M.Hackstein, S.Heinze, H.Hess, M.Huyse, D.Jenkins, J.Konki, M.Kowalczyk, T.Kroll, R.Krucken, J.Litzinger, R.Lutter, N.Marginean, C.Mihai, K.Moschner, P.Napiorkowski, B.S.Nara Singh, K.Nowak, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, S.Rigby, L.M.Robledo, R.Rodriguez-Guzman, M.Rudigier, M.Scheck, M.Seidlitz, B.Siebeck, G.S.Simpson, P.Thole, T.Thomas, J.Van de Walle, P.Van Duppen, M.Vermeulen, D.Voulot, R.Wadsworth, F.Wenander, K.Wimmer, K.O.Zell, M.Zielinska

Shape dynamics in neutron-rich Kr isotopes: Coulomb excitation of 92Kr, 94Kr and 96Kr

NUCLEAR REACTIONS 194,196Pt(92Kr, 92Kr'), (94Kr, 94Kr'), (96Kr, 96Kr'), E=2.85 MeV/nucleon; measured projectile and target E, I(θ, t) using DSSD, Eγ, Iγ(θ) from Coulomb excitation using HPGe array and considering Doppler correction, (particle)γ-coin; calculated electromagnetic matrix elements, γ-ray yields using CC code GOSIA2, energy vs deformation using IBM-2 with self-consistent constrained HFB with Gogny functional; deduced Coulomb excitation σ, electromagnetic matrix elements using fit to data, B(E2), quadrupole moments, IBM-2 Hamiltonian parameters. 96Kr calculated levels, J, π; deduced shape coexistence.

doi: 10.1016/j.nuclphysa.2013.01.013
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2013BA38      Phys.Rev. C 88, 021302 (2013)

C.Bauer, G.Rainovski, N.Pietralla, D.Bianco, A.Blazhev, T.Bloch, S.Bonig, A.Damyanova, M.Danchev, K.A.Gladnishki, T.Kroll, J.Leske, N.Lo Iudice, T.Moller, K.Moschner, J.Pakarinen, P.Reiter, M.Scheck, M.Seidlitz, B.Siebeck, C.Stahl, R.Stegmann, T.Stora, Ch.Stoyanov, D.Tarpanov, M.J.Vermeulen, D.Voulot, N.Warr, F.Wenander, V.Werner, H.De Witte

Local suppression of collectivity in the N=80 isotones at the Z=58 subshell closure

NUCLEAR REACTIONS 48Ti, 64Zn(140Nd, 140Nd'), E=399 MeV; measured Eγ, Iγ, (particle)γ-coin, yields using RILIS source and Miniball array at REX-ISOLDE-CERN facility. 140Nd; deduced E2 and diagonal matrix elements, B(E2) and Q2 for first 2+ state from Coulomb excitation. 48Ti, 64Zn, 140Sm; measured Eγ for first 2+ states. Comparison with shell-model and QPM calculations. Systematics of B(E2) values for first 2+ states in even-even N=80, Z=50-60 nuclei.

doi: 10.1103/PhysRevC.88.021302
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2013GA23      Nature 497, 199 (2013)

L.P.Gaffney, P.A.Butler, M.Scheck, A.B.Hayes, F.Wenander, M.Albers, B.Bastin, C.Bauer, A.Blazhev, S.Bonig, N.Bree, J.Cederkall, T.Chupp, D.Cline, T.E.Cocolios, T.Davinson, H.De Witte, J.Diriken, T.Grahn, A.Herzan, M.Huyse, D.G.Jenkins, D.T.Joss, N.Kesteloot, J.Konki, M.Kowalczyk, Th.Kroll, E.Kwan, R.Lutter, K.Moschner, P.Napiorkowski, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, K.Reynders, S.V.Rigby, L.M.Robledo, M.Rudigier, S.Sambi, M.Seidlitz, B.Siebeck, T.Stora, P.Thoele, P.Van Duppen, M.J.Vermeulen, M.von Schmid, D.Voulot, N.Warr, K.Wimmer, K.Wrzosek-Lipska, C.Y.Wu, M.Zielinska

Studies of pear-shaped nuclei using accelerated radioactive beams

NUCLEAR REACTIONS 60Ni, 112,114Cd, 120Sn(220Rn, 220Rn'), (224Ra, 224Ra'), E=2.82, 2.83 MeV/nucleon; [220Rn and 224Ra secondary beams from U(p, X), E=1.4 GeV primary reaction]; measured Eγ, Iγ, γγ-, (particle)γγ-, (particle)(particle)γ-coin using Miniball array and DSSSDs at REX-EBIS-ISOLDE-CERN facility. 220Rn, 224Ra; deduced levels, J, π, γ-branching ratios, electromagnetic matrix elements, B(E1), B(E2), B(E3), Q1, Q2, Q3, octupole collectivity and deformation. Discussed electric dipole moment (EDM). Coulomb excitation data analyzed using GOSIA computer code. Comparison with self-consistent mean-field theory, and cluster model calculations. Systematics of Q1, Q2 and Q3 for 218,220,222,224,226Rn, 220,222,224,226,228Ra.

doi: 10.1038/nature12073
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2012AL03      Phys.Rev.Lett. 108, 062701 (2012); Erratum Phys.Rev.Lett. 109, 209904 (2012)

M.Albers, N.Warr, K.Nomura, A.Blazhev, J.Jolie, D.Mucher, B.Bastin, C.Bauer, C.Bernards, L.Bettermann, V.Bildstein, J.Butterworth, M.Cappellazzo, J.Cederkall, D.Cline, I.Darby, S.Das Gupta, J.M.Daugas, T.Davinson, H.De Witte, J.Diriken, D.Filipescu, E.Fiori, C.Fransen, L.P.Gaffney, G.Georgiev, R.Gernhauser, M.Hackstein, S.Heinze, H.Hess, M.Huyse, D.Jenkins, J.Konki, M.Kowalczyk, T.Kroll, R.Krucken, J.Litzinger, R.Lutter, N.Marginean, C.Mihai, K.Moschner, P.Napiorkowski, B.S.Nara Singh, K.Nowak, T.Otsuka, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, S.Rigby, L.M.Robledo, R.Rodriguez-Guzman, M.Rudigier, P.Sarriguren, M.Scheck, M.Seidlitz, B.Siebeck, G.Simpson, P.Thole, T.Thomas, J.Van de Walle, P.Van Duppen, M.Vermeulen, D.Voulot, R.Wadsworth, F.Wenander, K.Wimmer, K.O.Zell, M.Zielinska

Evidence for a Smooth Onset of Deformation in the Neutron-Rich Kr Isotopes

NUCLEAR REACTIONS 194,196Pt(94Kr, 94Kr'), (96Kr, 96Kr'), 285 MeV/nucleon; measured reaction products, Eγ, Iγ. 94,96Kr; deduced J, π, B(E2), spectroscopic quadrupole moments. Comparison with IBM calculations based on the constrained HFB approach using the microscopic Gogny-D1M energy density functional.

doi: 10.1103/PhysRevLett.108.062701
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